.banner-card {
    width: 100%;
    height: 250px;
    line-height: 250px;
    /* background: #ffffff; */
    position: absolute;
    left: -1%;
}

.banner-card ul {
    width: 72%;
    height: 100%;
    margin: 0 auto;
    text-align: center;
    position: relative;
}

.banner-card li {
    width: 824px;
    position: absolute;
    top: 25px;
    list-style-type: none;
    -webkit-transition: 0.3s;
    -moz-transition: 0.3s;
    -ms-transition: 0.3s;
    -o-transition: 0.3s;
    transition: 0.3s;
    cursor: pointer;
}

.banner-card li img {
    display: inline-block;
    width: 100%;
    height: 100%;
}

.one {
    z-index: 1;
    left: 75px;
    -webkit-transform: scale(0.8);
    -moz-transform: scale(0.8);
    -ms-transform: scale(0.8);
    -o-transform: scale(0.8);
    transform: scale(0.8);
}

.two {
    z-index: 2;
    left: 175px;
    -webkit-transform: scale(0.9);
    -moz-transform: scale(0.9);
    -ms-transform: scale(0.9);
    -o-transform: scale(0.9);
    transform: scale(0.9);
}

.three {
    left: 275px;
    z-index: 3;
    -webkit-transform: scale(1);
    -moz-transform: scale(1);
    -ms-transform: scale(1);
    -o-transform: scale(1);
    transform: scale(1);
}

.four {
    z-index: 2;
    left: 375px;
    -webkit-transform: scale(0.9);
    -moz-transform: scale(0.9);
    -ms-transform: scale(0.9);
    -o-transform: scale(0.9);
    transform: scale(0.9);
}

.five {
    left: 475px;
    z-index: 1;
    -webkit-transform: scale(0.8);
    -moz-transform: scale(0.8);
    -ms-transform: scale(0.8);
    -o-transform: scale(0.8);
    transform: scale(0.8);
}

.Big_nav {
    position: relative;
    width: 824px;
    margin: 300px auto;
    cursor: pointer;
}

.banner-card div span {
    display: inline-block;
    font-size: 25px;
    position: absolute;
}

.left-btn {
    float: left;
}

.right-btn {
    float: right;
}